Nut-lock.



I PATENTED MAX 7, 1907.

J. J. JENNINGS.

NUT LOCK.

APPLICATION IIILED JAN.7,1907.

Witnesses Uivrrnsrars Arrnnr 'oFFIoE.

JOHN J. JENNINGS, OF REIDVILLE, SOUTH CAROLINA.

NUT-LOCK.

Specification of Letters Patent.

Patented May 7, 1907.

Application filed January 7,1907. Serial No. st1', 2o0.,

1U we! mom v it concern.-

Be it known that I, JOHN J. JENNiNos, a citizen of the United States ofAmerica, and a resident of Reidville, in the county of Spartanburg andState of South Carolina, have invented certain new and usefulImprovements in Nut-Locks, of which the following is a specification.

his invention relates to that class or type of nut locks in which a nuthas a divided part that-projects from the face of the nut, such partcarrying a second nut which may be ad justed upon the divided part, tocompress the same upon the threads of the bolt to provide a secure lock,and my invention not only provides means for effecting such a look, but

also includes means whereby the removal or se aration of thecompressing-nut fromthe bo t-engaging-nutv is prevented, as will behereinafter set forth.

In the accompanying drawings Figure 1 is the nut B, which is internallythreaded to enthreading the neck the nut gage the threads of the boltmay be of less thickness than the standard nuts, and from the front orface of the nut B there projects a neck I), the samehaving internalthreads, the same as those of the nut, the exterior of the neckistapered or conical and diminishes in diameter from the face of the nutB outward, the neck I) is externally threaded and is pro,- vided with aplurality of slits 'or kerfs b which extend from the outer end of theneck to the face of the nut.

By the construction shown the bolt-engaging-nut and its externallytapered neck are internally threaded before the slits are formed in theneck, and either prior or subseciuent to the slitting or kerfing of theneck tie external threads are formed, and such threads may be of thesame gage or pitch as the threads of the bolt. By internally B will havea greater bolt engaging surface than is usual, and the width of the nutproper may be less than nuts as usually manufactured.

The compression-nut C has a tapered open:

ing or bore which is threaded to correspond with the threads upontheneck, and in practice the compression-nut will engage the externalthreads on the neck I) when positioned at the outer end of the neck, andthe compression-nut O has formed in its outer face a recess 0. W hen thecoin ress on-nut C'has' been placed upon the neo 'b of thebolt-engagingnut B, the outer end of the neck is upset or spread outwardto provide a flange I), which will enter therecess 0 Whenthecompression-nut is at the outer end of the neck, and when so positionedthe' divisions of the neck will not be compressed, the boltengagingenutwill be free bolt and the one with the other.

ting of the end of the of the compression-nut either when on or. off ofthe bolt and serves to maintain the sides in alinement so that the jawsof a wrench will engage both nuts to turn the same in The fianging orupsetumson, in screwing the -bolt-engaging-nut on or off the bolt, andwhen the bolt-engaging" nut has been screwed home be moved to engagesolely nut and it can be moved cause the sections of the the threads tosecurely lock the nut upon the be t. i

The bolt-engag'ging-nut and the compression-nut may be furnished to thetrade With internal threads of standardgage, as an article ofmanufacture, and the nut B is not weakened by being slit. In use the nutC, may be forced toward the outer face of the nut B, to give the desiredamount of friction the Wrench may the compressionbetwecn the threads ofthe bolt and the neck, and when the compression nut is screwed to theouter end of the neck; the

nuts mav be removed from the bolt in the usual manner.

of the wrench will effect suchla strain that the nut will be held on thebolt so asrto pro- 'vide a secure and positive lock, andfwhen the nutsare ofsmall size two opposite slits Will .be sufficient, where'aswithslits are preferable.

I claim'. I 7 A bclt-engaging-nut havin tension win ch art-e p to moveupon the, sides of the nuts will be in line neck prevents removaluponthe neck to neck to jar 1'1 upon .95 The combinedinclined surfaces ofthe threads and tapered neck, and the leverage:

'IOQ

argernuts four:

5 sion, 2 compression-nut having internal 'Witnesses:

anal-its EXT/HD5101} both being internally ingmut and a. circumfelengial recess in. the ,thl'ez'ded', longitudinal sfits through theexouter face of the compression-nut, substantension and outwardextending flanges on tially as shown. v

the'outer ends of the divisions of the exten- JOHN J. JENNINGS.

" threads for'engage ment with the external D. O. LEONARD, threads 0fthe extension of. tha bo1tengag- N. G. ALVERAN.

